Even old school Holley's have issues. "Why is my carb always leaking?" Holley has always had the reputation for being a "Calibrated fuel leak". That said, once its set, and correctly rebuilt, it will/should be fine. Sniper EFI is not perfect. When an aftermarket conversion is made for a 'universal' across the board usage, there are bound to be issues. In my view, only an OEM set up will be reliable. Just me.